Started user control

static/leafletCluster/spec/suites/PaneSpec.js

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+describe('Map pane selection', function() {
+    /**
+     * Avoid as much as possible creating and destroying objects for each test.
+     * Instead, try re-using them, except for the ones under test of course.
+     * PhantomJS does not perform garbage collection for the life of the page,
+     * i.e. during the entire test process (Karma runs all tests in a single page).
+     * http://stackoverflow.com/questions/27239708/how-to-get-around-memory-error-with-karma-phantomjs
+     *
+     * The `beforeEach` and `afterEach do not seem to cause much issue.
+     * => they can still be used to initialize some setup between each test.
+     * Using them keeps a readable spec/index.
+     *
+     * But refrain from re-creating div and map every time. Re-use those objects.
+     */
+
+    /////////////////////////////
+    // SETUP FOR EACH TEST
+    /////////////////////////////
+
+    beforeEach(function () {
+
+        // Nothing for this test suite.
+
+    });
+
+    afterEach(function () {
+
+        if (group instanceof L.MarkerClusterGroup) {
+            group.clearLayers();
+            map.removeLayer(group);
+        }
+
+        // Throw away group as it can be assigned with different configurations between tests.
+        group = null;
+
+    });
+
+
+    /////////////////////////////
+    // PREPARATION CODE
+    /////////////////////////////
+
+    var div, map, group;
+
+    div = document.createElement('div');
+    div.style.width = '200px';
+    div.style.height = '200px';
+    document.body.appendChild(div);
+
+    map = L.map(div, { maxZoom: 18 });
+
+    // Create map pane
+    map.createPane('testPane');
+
+    // Corresponds to zoom level 8 for the above div dimensions.
+    map.fitBounds(new L.LatLngBounds([
+        [1, 1],
+        [2, 2]
+    ]));
+
+
+    /////////////////////////////
+    // TESTS
+    /////////////////////////////
+
+    it('recognizes and applies option', function() {
+        group = new L.MarkerClusterGroup({clusterPane: 'testPane'});
+
+        var marker = new L.Marker([1.5, 1.5]);
+        var marker2 = new L.Marker([1.5, 1.5]);
+
+        group.addLayers([marker, marker2]);
+        map.addLayer(group);
+
+        expect(map._panes.testPane.childNodes.length).to.be(1);
+    });
+
+    it('defaults to default marker pane', function() {
+        group = new L.MarkerClusterGroup();
+
+        var marker = new L.Marker([1.5, 1.5]);
+        var marker2 = new L.Marker([1.5, 1.5]);
+
+        group.addLayers([marker, marker2]);
+        map.addLayer(group);
+
+        expect(map._panes[L.Marker.prototype.options.pane].childNodes.length).to.be(1);
+    });
+
+    /////////////////////////////
+    // CLEAN UP CODE
+    /////////////////////////////
+
+    map.remove();
+    document.body.removeChild(div);
+
+});